I opted for this small and inexpensive device, because it is one of the few MP3 players with built microSD slot. So I can take a lot of audio books on the go. The description is only talk of a MicroSD slot, no word on whether MicroSDHC also supported (Note: MicroSD goes to 8GB MicroSDHC up to 32 GB; MicroSD older systems can usually read no microSDHC). The key question was whether the unit eg with the 16GB MicroSDHC work together, which I still have here - and it goes smoothly. I now have a total of 18 GB of audio books in a super small and lightweight and inexpensive device ... that's worth smooth five points!